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Finding the Fourth Proportional to 13,596.60, 20,409.48 and 7,021.02

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Solution

The fourth proportional to 13,596.60, 20,409.48 and 7,021.02 is: 10,539.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,596.60 : 20,409.48 = 7,021.02 : x
  2. Step 2: Convert to fraction form
    13,596.60/20,409.48 = 7,021.02/x
  3. Step 3: Cross multiply
    13,596.60x = 20,409.48 × 7,021.02
  4. Step 4: Simplify right side
    13,596.60x = 143,295,367.27
  5. Step 5: Solve for x
    x = 143,295,367.27/13,596.60
  6. Step 6: Final answer
    x = 10,539.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.